UTF-8和不带BOM的UTF-8有什么区别? [英] What's the difference between UTF-8 and UTF-8 without BOM?

问题描述

没有 BOM 的UTF-8和UTF-8有什么区别?哪个更好?

What's different between UTF-8 and UTF-8 without a BOM? Which is better?

推荐答案

UTF-8 BOM是文本流(0xEF, 0xBB, 0xBF)开头的一系列 bytes ，允许读者以更可靠地猜测文件是否已以UTF-8编码.

The UTF-8 BOM is a sequence of bytes at the start of a text stream (0xEF, 0xBB, 0xBF) that allows the reader to more reliably guess a file as being encoded in UTF-8.

通常， BOM 用于表示

Normally, the BOM is used to signal the endianness of an encoding, but since endianness is irrelevant to UTF-8, the BOM is unnecessary.

根据 Unicode标准，不建议使用UTF-8文件:

According to the Unicode standard, the BOM for UTF-8 files is not recommended:

2.6编码方案

... UTF-8既不需要也不建议使用BOM，但是在从其他使用BOM的编码形式转换UTF-8数据或BOM用作UTF的情况下可能会遇到BOM. -8签名.请参见 第16.8节特价"中的字节顺序标记"小节 > ，以获取更多信息.

2.6 Encoding Schemes

... Use of a BOM is neither required nor recommended for UTF-8, but may be encountered in contexts where UTF-8 data is converted from other encoding forms that use a BOM or where the BOM is used as a UTF-8 signature. See the "Byte Order Mark" subsection in Section 16.8, Specials, for more information.

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